in·fra·sound ( n fr -sound )n. A wave phenomenon sharing the physical nature of sound but with a range of frequencies below that of human hearing. |
infrasound [ˈɪnfrəˌsaʊnd]
n
(Physics / General Physics) soundlike waves having a frequency below the audible range, that is, below about 16Hz
infrasonic [ˌɪnfrəˈsɒnɪk] adj
| infrasound (nfr-sound) Sound whose wave frequency is too low (under 15-20 hertz) to be heard by humans. Some animals, such as elephants and whales, emit calls at infrasound frequencies. See Note at ultrasound. infrasonic adjective |
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